Students from Mastery Martial Arts, located at 39 Putnam Pike in Johnston, performed the pre-game entertainment for the Pawtucket Red Sox on Saturday at McCoy Stadium. Seventeen participants between the ages of 7 and 17 showed off their martial arts skills under the direction of instructors Ronnie Russo and Anthony Pezzillo. The studio performs on a volunteer basis and the majority of the students have a black belt. Mastery also has locations in Smithfield, North Smithfield, Warwick, Cranston and Cumberland. For more information, visit www.masteryma.com.